KOIKE Sanso Kogoyo Co. Ltd. (Japan) reported a ransomware extortion claim by the threat actor exitium, alleging the group exfiltrated 5.8 TB of data and threatened to sell it if contact is not made by Tuesday (10.13.2026). The stolen files reportedly include agreements, confidential information, customer/client datasets, engineering drawings, and correspondence. #Japan
Incident Details
- Victim: KOIKE Sanso Kogoyo Co. Ltd.
- Sector: Manufacturing
- Country: JP
- Actor: exitium
- Source: http://m3ksukzn2glzfdvlusohril7n3iyk4z4fudf6mm22lwhpbpt5aiee5qd.onion#KOIKE%20Sanso%20Kogoyo%20Co.%20Ltd.
- Discovered: 2026-10-10T14:31:50.448423+00:00
- Published: 2026-10-10T14:31:32.355306+00:00
Information
- Website: koike-japan.com
- You have time until Tuesday (10.13.2026). If you do not contact us, we will start selling the data.
- We have 5.8 TB of data.
- Agreements
- Confidential data
- Correspondence files
- All customer and client data
- Engineering drawings
- And much more
- Contact us before your time runs out
Disclaimer: This post is based on public claims made by the ransomware group "exitium". I cannot confirm the accuracy of the information. However, I would be happy to share any official statement from the affected organization to provide clarification.